Global connections need to be locked down to 500, and 100 per torrent.
You need to learn how to configure this stuff, as your settings are causing the problems. Not a problem for the router.
Maximum download rate could be set at unlimited, and Maximum upload rate should be set at 20KB/sec or so.
You are literally starving your connection by saturating it. No wonder why you get disconnects and bad lag. If you notice you set it for the MAXIMUM amount of bandwidth that is available to you. That's a big no-no.